CatgutViolin Posted August 20, 2012 Report Share Posted August 20, 2012 Ack, turning the gun over to load it.... hurts my eyes.... The funny thing is, that's literally the only way possible to load the real thing. The real SPAS-12 requires you to hold down a button on the side of the receiver to load it, otherwise the lifter won't budge and there's no way to get the shells into the gun. One of many reasons why it wasn't as successful as Hollywood would lead one to believe. The main problem is that the gun weighs just shy of ten pounds. Holding it shouldered while trying to feed eight shells in gets uncomfortable pretty quickly. And it seams just as reliable as any other shell ejecting shotgun. Normally Maruzens lose their reliability because the pot metal extractor wears out very quickly, and Tanakas just break because they're made of tinfoil and fine china. The extractor's been replaced here, so full reliability should be entirely doable. STILL. very nice work you've done there, getting so far wit it. Thanks! There's still a lot of fine tuning to be done but it's getting close to completion now. Quote Link to post Share on other sites
CatgutViolin Posted August 20, 2012 Report Share Posted August 20, 2012 any one know if the g&p masterkey kit is for the shell ejector or the mag fed 870? Mag fed. The shell ejector stores gas in the grip or stock, so without either of those there's nothing to provide power. Quote Link to post Share on other sites
notrabies Posted August 20, 2012 Report Share Posted August 20, 2012 And it seams just as reliable as any other shell ejecting shotgun. Clearly you've never worked with one of mine! Mag fed. The shell ejector stores gas in the grip or stock, so without either of those there's nothing to provide power. True, but keep in mind that if you aren't opposed to some style of external gas setup, it will fit the gas M870, they have the same dimensions. Best idea I've thought of so far is to have a mini 12g CO2 rig installed in your upper handguard, or between the masterkey and the barrel. Depending on the dimensions, it could be a very simple thing to rig up with a ziptie, especially if you're after performance more than looks. Quote Link to post Share on other sites
Bando Posted August 20, 2012 Report Share Posted August 20, 2012 what im thinking is the gas in the uper handguard/rail or in a PEQ box. only problem is i have no experience in custom working Gas rigs. but you guys think the G&P kit WILL fit the shell ejector? Quote Link to post Share on other sites
notrabies Posted August 20, 2012 Report Share Posted August 20, 2012 what im thinking is the gas in the uper handguard/rail or in a PEQ box. only problem is i have no experience in custom working Gas rigs. but you guys think the G&P kit WILL fit the shell ejector? I don't have personal experience with fitting it, but CA870 metal receivers made by G&P fit the gas M870's from everything I've heard, so the masterkey receiver should fit just as well. I imagine with some cutting you could even make the masterkey fit an M1100, but that's a rather different idea which will wait until I get one myself. Quote Link to post Share on other sites
sandstorm Posted August 20, 2012 Report Share Posted August 20, 2012 AFAIR, M870 and M1100 were plenty similar 'in receiver'. Many of the M1100's have been put into M870 metal receivers. Only problem with a M1100 masterkey would be in actuating the first loading, as the charging handle would be on the right side of the assembly. Quote Link to post Share on other sites
Bando Posted August 20, 2012 Report Share Posted August 20, 2012 can you run an 870 off co2? and whats the mag tube capacity on the standard 870? (also might make a project thread to stop cluttering up picture thread) Quote Link to post Share on other sites
notrabies Posted August 21, 2012 Report Share Posted August 21, 2012 AFAIR, M870 and M1100 were plenty similar 'in receiver'. Many of the M1100's have been put into M870 metal receivers. Only problem with a M1100 masterkey would be in actuating the first loading, as the charging handle would be on the right side of the assembly. Yeah I'm trying to decide if running no charging handle would be adequate, or if I should look into an alternate solution. I could either cut a groove for the charging handle, or I could add an M870 pump to cock the gun. Only issue with the latter is I'm not sure I'd have enough room to fully push back the bolt with the limited space on the M1100 Revision. Then its just figuring out how to mount the gas system. Quote Link to post Share on other sites
sandstorm Posted August 21, 2012 Report Share Posted August 21, 2012 Don't know about the revisions, as I have the older M1100 and M870. M1100 could be fit with the pump from M870, just use single strut (or that's ow I understood someone's post here earlier.) I think there's a thread for the Maruzen gas shotties in Technical discussion board? Quote Link to post Share on other sites
notrabies Posted August 21, 2012 Report Share Posted August 21, 2012 You're thinking of my post, I was the one who made that M870/M1100 hybrid. The trick is that on the Revision the pump wouldn't have enough space to move all the way back to fully open the bolt, unless I use some short of very small pump. I'd think I could make it work with the mad dog pump, but I'm not sure I want to go out and buy one until I have enough money for the whole kit. Quote Link to post Share on other sites
onizuka-gto Posted August 22, 2012 Report Share Posted August 22, 2012 Got that video done. http://www.youtube.com/watch?v=6_atCQWgSao&feature=plcp Cheers for the video, looks amazing! Can't wait to get my TM spas-12 body, then i can start working on my own! The external HPA looks mint, but it's hard to get them in Hong Kong, not to mention getting my Airsoft group to allow me to play with that type of rig! lol. But maybe use those small CO2 canisters? They are easy to pick up at any local airsoft shop. But probably get the external pump working first before thinking of switching over to CO2 canisters, not sure if i can fit one in the grip, but i guess i can always strap it to the outside or fit it on a folding stock if i can find any ktw like you have. Quote Link to post Share on other sites
Avenger96 Posted August 22, 2012 Report Share Posted August 22, 2012 I have a little question. I want to try and do something similar to what Spas 12 guy did, but I don't know if it will work at all. My plan is to acquire a trishot M1014 and try to cram an ACM M500 inside. I am capable of serious custom modification, but has anyone tried it before? Quote Link to post Share on other sites
ED-SKaR Posted August 22, 2012 Report Share Posted August 22, 2012 My plan is to acquire a trishot M1014 and try to cram an ACM M500 inside. I am capable of serious custom modification, but has anyone tried it before? You might be better off fitting the M4s90 parts to the m500, the reason why TM only ever made SPAS and M3 shotties is that their tri-shot system is very wide, and the m870/ithica/mossberg shotguns are all too thin. Now, see what I'd like is a G-SBB* M4s90 that does not eject shells. I've most of a design plummed out in my head but I've no skill to do it. *Gas-Semiblowback. you use a GBB mech so that you can have a light trigger pull, and a short cycle distance and no weight on the piston so that there is no felt recoil..... because there is no point in felt recoil. Quote Link to post Share on other sites
WhiteHawksan Posted August 22, 2012 Report Share Posted August 22, 2012 in short. It'll be a doddle. I've got an M3 (I'massuming you're using a variant thereof ) and I can take a picture of the mech if you need it. Basically, Fill the sides of the body to support mechanism and provide channels for pump arms fix pump arms to M3 grip ??? Profit! Quote Link to post Share on other sites
notrabies Posted August 23, 2012 Report Share Posted August 23, 2012 (edited) You might be better off fitting the M4s90 parts to the m500, the reason why TM only ever made SPAS and M3 shotties is that their tri-shot system is very wide, and the m870/ithica/mossberg shotguns are all too thin. Now, see what I'd like is a G-SBB* M4s90 that does not eject shells. I've most of a design plummed out in my head but I've no skill to do it. *Gas-Semiblowback. you use a GBB mech so that you can have a light trigger pull, and a short cycle distance and no weight on the piston so that there is no felt recoil..... because there is no point in felt recoil. I mean you could do things the easy way and throw in a Maruzen M1100 Defender I in there; 3 shots semi-auto is pretty good, and you get blowback with essentially zero felt recoil as the bolt is super light. The only negative is that the magazines are completely unfindable and are only 18 shots to begin with. If you can make a new magazine, and don't mind external CO2, it could easily be a very simple project. My thoughts for modifying the magazine are to either take the internals and rig them onto a standard midcap magazine, or to convert the mag to feed from a magazine located in the mag tube, much like RenegadeCow's serbu mag. Edited August 23, 2012 by notrabies Quote Link to post Share on other sites
Agent Hunk Posted August 31, 2012 Report Share Posted August 31, 2012 Light mount came in. UTG M3L ATI heat shield EssTac Shotgun card V-TAC 2 point Leapers 12 gauge mount Solarforce L2M Vltor Scout Mount 1 Quote Link to post Share on other sites
Avenger96 Posted August 31, 2012 Report Share Posted August 31, 2012 That's 100% the sexiest M3 I've ever seen, great job! Quote Link to post Share on other sites
heroshark Posted September 10, 2012 Report Share Posted September 10, 2012 Quote Link to post Share on other sites
ChickenWatermelon Posted September 10, 2012 Report Share Posted September 10, 2012 Looks great Heroshark! Is the black one custom made? Quote Link to post Share on other sites
heroshark Posted September 10, 2012 Report Share Posted September 10, 2012 (edited) Cheers bud .You could say that, its been hacked up a bit over the years . its a tm m3 base with ati heat sheild and stock. Cut the pump to fit the rail and modded the bolt to cycle. The mags a modded g3 hi-cap. Edited September 10, 2012 by heroshark Quote Link to post Share on other sites
Shardik Posted September 10, 2012 Report Share Posted September 10, 2012 HS I'm more interested in that light mount? Quote Link to post Share on other sites
heroshark Posted September 10, 2012 Report Share Posted September 10, 2012 well I cut out the bottom of the pump fitted what I think is a g36 rail to the pump .Put on the larue bits and the ring is a standard low profile 1" scope ring. Quote Link to post Share on other sites
Shardik Posted September 10, 2012 Report Share Posted September 10, 2012 That's exactly what I was wanting done. You did the work yourself I presume? Quote Link to post Share on other sites
heroshark Posted September 10, 2012 Report Share Posted September 10, 2012 Yep. Quote Link to post Share on other sites
ChickenWatermelon Posted September 11, 2012 Report Share Posted September 11, 2012 Cheers bud .You could say that, its been hacked up a bit over the years . its a tm m3 base with ati heat sheild and stock. Cut the pump to fit the rail and modded the bolt to cycle. The mags a modded g3 hi-cap. So they don't hold any real airsoft shotgun shells? Quote Link to post Share on other sites
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