Say Hello To My Even Littler Friend. I just put the T-Rex stock on this morning. The threaded part of the stock is short, and the socket it screws into is deep, so I tried screwing it in without the castle nut on it. It screwed all the way in and when it bottomed out, the stock was almost right side up. So I put a bunch of 242 blue Loctite on the threads, screwed it in until it was snug, and kept going until it was right side up. I have no idea what it's torqued to, because I just twisted the butt around until it wouldn't go any farther, and it was facing the right way. I put the length limiting set screw in the next to last hole, so when I pull the stock out it will stop there, and the trigger pull is 13 3/4", the same as my other AR with an A2 fixed stock on it. It's only 11 3/4" collapsed, and under 5 3/4" from the trigger face to the end of the buffer tube. If any little people need a rifle with a L.O.P. less than 6", it would be possible to make one.
I ordered a Rifle size STAP Stock Plate LWS/PB from Midwest Industries. It's 4 3/4" tall, and the T-Rex is only 4". If it fits on the end of the Telescoping Adaptor for Tailhook Mod 1 and T-Rex Stock Shoulder Plate, I'll drill and tap 2 screw holes and stick it on there. I LIKE BIG BUTTS AND I CANNOT LIE. If it doesn't fit, I'll send it back and keep the gun it as is. There's an indexing pin about 3/4" long that fits in the groove on the bottom of the stock tube, just above the cross-screw, to keep the butt plate from rotating. It seems like a simple but effective solution.
Now I'm going to Homeboy Depot to pick up a can of Rust-Oleum Flat Black BBQ Spray Paint, to paint over the threads on the old buffer tube. Then I'll be ready to put that and the M4 carbine stock on the other rifle in place of the A2 stock. It might look funny when I put the 20" upper on, but that's what the Canadian military did. They put a collapsible stock on a full-size rifle to make it compatible with thick body armor, and short arms
, instead of staying with the A2 stock. I just got a new castle nut Monday when I got the stock and my new knife. Three packages from 3 different places in the mail all at once. And since I didn't use a castle nut on this gun, I have an extra one. One has deep staking notches, right down to the inside edge, and the other one only has shallow dimples. The old one I'm throwing away because I bunged up one wrench slot with a spanner, has notches halfway in between these two. It's still serviceable, but doesn't look that good and it's only a $5 part.
https://deadfootarms.com/products/dead-foot-arms-shoulder-plate.html https://midwestindustriesinc.com/stap-stock-plate/ https://deadfootarms.com/products/telescoping-adaptor-tailhook-mod-1 P.S. I just double-checked the OAL of my rifle with the stock folded, and it's 26 3/8". That's just about as short as you can get without a tax stamp for an SBR, and is actually shorter than some pistol ARs with braces. And it's 3/8" shorter than a Daniel defense MK18 SBR with a 10.3" barrel. I can put my regular 16" upper on and it will be same length + the flash hider, unless I take it off and put a thread protector I made from an old flash hider on. Then it would still be shorter than the MK18.