ditch the carbine stock, buffer, and extension and install an A2 rifle length extension and buffer along with the A2 rifle style stock of your choosing, it will help greatly with recoil.
also an adjustable gas block makes great strides to recoil reduction- if you are only shooting one kind of...
4Lbs 1.3Oz with optic
working to shave the last 1.3 with some home made custom carbon parts
Coda carbon Rail that I modified a tad (I like the stabby look) , Smoke composites stock-short pull closed with Mlock slots, Brigand carbon pistol grip, 2a Ti adjustable gas bolt assembly, Master of arms...
"utilizes a portion of the energy of a firing cartridge to extract the fired cartridge case and chamber the next round"
Time to design an battery powered AR 15 operating mechanism that uses no gas or inertia to work... sort of like electric airsoft rifles work.
remove gas block and have an...
meyer plastics will have the bar stock
it cuts like butter- low footage <100 nice stiff feed to prevent melting .005-.020/tooth.
it doesnt suffer breakout issues like PVC
http://www.ballistatactical.com/
I have played with one of these (got it free) and it's seriously well built, no doubt it will last forever-- but-- its fairly heavy and the rails are so short not much fits on them, not to mention confusing as hell to use ---
the wilson lancers are sweet, the modifications are bending the feed lips a tad to allow the rounds to "present" in a more "bullet up" orientation.
which is how one fixes steel mags that Jam- a little wiggle on the lips with some needle nose pliers works magic.
the pic below shows how my lancer...
there was a batch of out of spec 400 grain cor-bon ammo some time ago
some of the early rock river chambers were a bit tight and needed re reamed or "flitzed"
the air blow method is to remove the barrel and plug the breech with a rag and blow int he barrel and feel the amount of air coming out...
not ejecting very well is normally gas settings-
the extractor spring is putting more bite on the case and making it harder to chamber,I'd remove it
I would swap out the spring for a stronger one if you have a few laying around. and if you have parts laying around i would weigh your buffers...
Most reputable gunsmiths have a good pin set and a 4
jaw chuck on their lathe- the 4 jaw allows the barrel to be dialed in using an indicator on a best fit gage pin slid in the bore-
I have had great luck with most common firearm lubricants except frog lube, that stuff glued my 458 socom firing pin in place in cold weather, i missed a deer because of it. never again! in it's defense, it WAS nice slick stuff in the hotter weather, just turned to glue in the cold. I use...