huggytree Posted July 17 Report Share Posted July 17 (edited) Just got it today. Spent 4 hours removing 70 years of cosmo. From dry firing it it appears someone put a 1918 trigger group in it. F is semi and A is full auto. Gas knob question. I assume tightest position is more gas and loosest position releases more gas ? So testing my ammo I’d want it on the most open position. Looking down on it - counter clockwise furthest spot? Edited July 17 by huggytree Link to comment Share on other sites More sharing options...
huggytree Posted July 18 Author Report Share Posted July 18 pretty sure it’s a semi / full as in semi the sear clicks back up. Link to comment Share on other sites More sharing options...
Orion Posted July 18 Report Share Posted July 18 That's an A2 trigger group, what does your buffer assembly in the butt stock look like? Link to comment Share on other sites More sharing options...
huggytree Posted July 18 Author Report Share Posted July 18 (edited) Dissembled it today. Full of cosmoline. The piston was so packed with cosmo in the tube that I had to use a screw driver and a hammer to tap it out the big spring twisted in half while dissembling. So im waiting for a new one to come I’m trying to understand how slow speed works. The sear is reset and it holds the bolt. Does the buffer unlock the sear when it bounces back? There’s no good function videos on the 1918a2. I’m trying to figure out how it works. Edited July 18 by huggytree Link to comment Share on other sites More sharing options...
Orion Posted July 18 Report Share Posted July 18 Link to comment Share on other sites More sharing options...
68coupe Posted July 19 Report Share Posted July 19 So, in effect, on could leave out the "L" shaped component in the actuator to achieve a true "Select-fire"? Inquiring minds want to know. Karl, 68coupe Link to comment Share on other sites More sharing options...
huggytree Posted July 19 Author Report Share Posted July 19 Perfect Thank you for the video. Link to comment Share on other sites More sharing options...
huggytree Posted July 20 Author Report Share Posted July 20 Still waiting for actuator spring but decided to take it out for a test fire. First round the gas plug flew out. Couldn’t find it. No idea how it blew past the threads but I’ll guess excessive pressure. probably full of cosmo . Going to reclean the gas tube again too Link to comment Share on other sites More sharing options...
68coupe Posted July 20 Report Share Posted July 20 2 hours ago, huggytree said: Still waiting for actuator spring but decided to take it out for a test fire. First round the gas plug flew out. Couldn’t find it. No idea how it blew past the threads but I’ll guess excessive pressure. probably full of cosmo . Going to reclean the gas tube again too Well that sucks!!! Fortunately, gas control parts are plentiful and the easiest to find. Karl, 68coupe Link to comment Share on other sites More sharing options...
huggytree Posted July 20 Author Report Share Posted July 20 Tube is 100% clear can anyone send a pic of how your late gas adjuster is set? I’m guessing the plug was plugged w cosmo. Or I don’t understand the proper depth it should be set at. crazy it blew off when it’s threaded on. Link to comment Share on other sites More sharing options...
StrangeRanger Posted July 21 Report Share Posted July 21 Way cheaper than blowing things up https://bmg.parts/product/tm9-1005-208-12/ 1 Link to comment Share on other sites More sharing options...
huggytree Posted July 21 Author Report Share Posted July 21 Found a new gas plug (all 3 parts) $50 nos then I know it’s good to go talked to a friend who has a bar. I had the gas setting correct. so im not sure what happened Link to comment Share on other sites More sharing options...
68coupe Posted July 21 Report Share Posted July 21 37 minutes ago, huggytree said: Found a new gas plug (all 3 parts) $50 nos then I know it’s good to go talked to a friend who has a bar. I had the gas setting correct. so im not sure what happened Must'a been plugged up & shot itsself off into that place in your shop, even though you were at the range...LOL It's somwhere in the cosmos near the realm of lost socks. Karl, 68coupe Link to comment Share on other sites More sharing options...
nate129 Posted July 22 Report Share Posted July 22 (edited) Huggytree, I made a post a few years back about how to modify an A2 lower to function correctly with a early m1918 receiver/buffer. Its kind of the reverse of what you are asking to make slow fire work as semi only, but if you follow my photos and methods in the thread I think a modified A2 lower in the same fashion would also result in semi only with an A2 receiver/buffer. Or maybe just removing the sear release stop lever without cutting off the rear of the sear would work to make semi only fire in slow selection - or replacing the entire A2 sear with an early sear if you can find one online. If you experiment with any of this, I would be very curious what the results are - my gun is a Winchester without the A2 mod so I can't experiment with this slow to semi stuff. With the A2 buffer movement needing a violent strike during firing to actuate I am not sure you will be able to test slow/semi experiments without shooting - in other words I don't think cycling the action with the charging handle is going to be violent enough to actuate the A2 buffer and trip the sear release. Maybe A2 owners here can confirm that. There are period reports mentioning the slow fire mode failing during combat due to the A2 buffer being froze up, the cause often being cleaning with barrel up which resulted in chemicals/residue being gravity fed into the buffer assembly which caused it to sieze or slow enough not to actuate the trip. I think the result of a frozen actuator would be semi in slow setting. The parts needing modification are inexpensive on the used market and the swap out is fairly easy to go back to original configuration. Hopefully the threads at the end of your buffer tube are okay after loosing the regulator? If not I believe the A3 gas tube still produced by Ohio Ordinance Works will work in the original guns. They would be cheaper than original tubes, which if worn out will get seepage around the piston head and could result in function problems. Some original tubes were modified to deny the early regulators, not sure if the A3 buffers have the denial mod. Edited July 22 by nate129 Link to comment Share on other sites More sharing options...
huggytree Posted August 11 Author Report Share Posted August 11 Gun now runs 100% 30 round mag works perfect Very enjoyable gun 1 Link to comment Share on other sites More sharing options...
Colt Chopper Posted August 12 Report Share Posted August 12 I also have a PM Royal Typewriter. One of my favorites to shoot, never misses a beat !!! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now