Rock8296

To add, as I couldn't figure out how to edit the post. Original design intent was to run ar-15 MLGS, after doing research I thought that rifle length may give better performance. Barrel hasn't been made yet so I'm not locked into rifle length gas, if midlength gas would give better performance I'd run that.

Getting new barrel turned for 308 SFAR build and looking for gas port recommendations. Barrel will be 1:8 SS 16.5" with .750 gb, ar-15 RLGS, will run 90-95% of the time suppressed with AEM5-30K Primary ammunition will be a mix of Tap AR 168 or M118LR&clones. Reciprocating weight, 11.7 for BCG + 5.3ish buffer with 308 flatwire. Not locked into that weight buffer just thought it was a good middle of the road weight. I'd like to make this work without any sort of adjustable gas, I don't have a problem swapping buffers to run unsuppressed. I'm hoping someone would have some insight or recommendations on this. Thanks for your time guys.

The frame should be large enough as there are already many builders of WSM, RCM, and SAUM cartridges. Finding an original DPMS SAUM bolt is hard to come by these days but KAK makes a specific bolt for it as well as an extractor so a regular ar bolt face could be opened up and ran. I think running it as a switchable gas gun, with the bolt locked back would leave enough room to drop a long loaded round into an enlarged ejection port and then release the bolt catch or push bolt forward manually.

So I have 2 PA10 uppers currently, a 14.7 with a 10" FF and a 20" M110 profile with a 15" FF. I'd like to step up to something bigger and longer range and what I am thinking is using a DPMS slick side hi-rise upper as a single shot or perhaps "switchable" straight pull. I am thinking of putting a reciprocating side charger and milling a slot on the upper reciever for it and then enlarging and lengthening the ejection port and chambering for .300 WSM with a .280 freebore. So it can function with gas on as a mag length repeater with my A191 inspired clone loads, or function with gas off as a single shot with 230 SMK loaded to 3.2 oal. The concept or inspiration for this build is my NRA High Power rifle. Most competitors use mag length ammo, 77gr 2.260 oal, for 200/300 and such and a long loaded 80gr SMK or the like single loaded to 2.550 oal for the 600 yd slow fire. So I guess my question more so is has anyone done something like this yet? and does anyone have any constructive ideas or comments for such a build? Thanks for your time. Rock