11-06-2014, 06:58 PM
LRRPF52 Wrote:The 18" MLGS is gassed pretty hard, much more so than a RLGS, so you will have to address it from a number of angles. If you are comparing a traditional set-up AR15 in any centerfire caliber to a JP LMOS with SCS with adjustable gas block, it is going to have more perceived recoil no matter what you do.
The JP LMOS + SCS + Adjustable Gas block feels like snot on a mirror, sliding inside your rifle, but with nothing moving in your reticle. It's a beautiful thing to behold, and feels nothing like shooting an AR15, which is already a very mild recoiling system with in-line recoiling and reciprocating forces.
I'm in the process of several 18" MLGS projects. Here is how I am approaching them:
I already know they are gassed hard, so I have an array of several different buffer and spring options.
* JP SCS for AR15 with standard spring weight captivated from the factory
* MGI RRB, with spacer for rifle tube, as well as carbine and rifle springs
* H2 buffer with carbine springs
* Spike's ST-T2 buffer with carbine springs
I'm still looking at buttstocks, and have a bunch to choose from, but I will be focusing on reliability, accuracy, and weight/balance. I want the JP SCS to work because it feels so amazing in these rifles. With 18" MLGS, I will be using some method to dial down the gas, and I am looking at the RCA adjustable gas key and Lo-mass BCG right now, nitrided.
I also have a Seekins ATC muzzle break, even though I'm not a huge fan of breaks for practical use. I'm considering installing it on one of these 18" guns.
Oops. Posted over you.
Yeah, i handled a buddy's jp 308 and and it was amazingly smooth. So i dropped the money on the SCS. It is unbelievable the difference it makes in feel. I suspect i'll be putting them in my other rifles now...
Here is my plan, please give me your thoughts. I think buying the jp spring pack and putting in a stiffer spring may be my first move. If nothing else it should slow the impulse down and spread it out. Hoping that will make it right.
Next step would be going to a blue sprinco spring, and maybe a lighter buffer? And possibly a heavier red sprinco and ligher buffer? Seems lightening the reciprocating mass would be good, but the heavier spring would still slow down the action? This is where i'm just shooting in the dark....