If there's no lightening cuts in the receiver and barrel, that's typically the easiest way to tell it's a fake made from a No.4, or if it says "No.4" on the side.
https://www.thefirearmblog.com/blog/2013/07/22/jungle-carbine-real-fake/
You'd have to go with either a proprietary design for the round to accommodate the magwell, such as a Noreen Bad News, or mate a bolt action upper to a standard lower such as a UPR-15/10.
Otherwise, 8.6 blackout is your answer.
Yes.
Limbsaver buttpad and a Caldwell Super Magnum Plus shoulder pad. <$100's worth of equipment.
Find what her optimal LOP is while wearing the Caldwell pad, chop the stock, figure out what model Limbsaver comes closest to fitting the chopped stock, then install.
If you want a carbine stock, use a carbine buffer tube, castle nut, endplate and a .308 carbine buffer.
If you want a rifle stock, use a rifle buffer tube and a .308 rifle buffer.
The stocks and buffer tubes are the same for AR10s and AR15s, the buffers are not.
EDIT: I misunderstood that the core problem was directly from the PRS cheek riser. This was a common problem on the older PRS stocks as they were made specifically for AR15s- the current Gen-3 PRS's riser clears the charging handle on both AR10s and AR15s.
M&P-10 is a stock DPMS pattern- the...
This is inaccurate: the SKS is usually more accurate than STAMPED AKs because SKS receivers are milled (only a few stamped Type 56 SKS examples exist).
Milled AKs usually can go toe-to-toe with SKSs in terms of raw mechanical accuracy. Short-stroke versus long-stroke piston designs generally...
Yes, shockingly. It's a common problem with under-advertising/marking and builders not knowing what they're getting into. Same goes with 6.8SCP builds. Sometimes the manufacturers don't even know there IS a difference.
For the barrel, look to see if the barrel says "Type II" on it. BCA...
Does the barrel match the bolt? Mixing Type I barrel with Type II bolt and vice-versa makes things not play nice.
If it's a Grendel Type I (7.62x39 bolt), remove the o-ring in the extractor. The extra spring pressure binds against the case rim and will cause that exact issue in your video.
If...
Several reasons including but not limited to:
-your local laws ban AR-15s but you want a 5.56
-using subsonic ammunition with suppressor and don't have to worry about cycling issues or action/exhaust sounds
-you don't like AR-15s
-you can't shoot worth jack with AR-15s and prefer a Mauser-esque...
Probably the same reason Finland manufactured "new" M91 mosins in the 1940s- parts are parts, and when your country's GDP is based around the potato you don't exactly toss a stockpile of old parts simply because they're not current-generation.
Check bore condition and gas system for corrosion...
Look for any stars on the barrel to tell you its constriction and make sure your friction rings are correctly set up for your loads.
Incorrect setup and you can destroy the receiver.
Beryl 7.62 uses a different bolt and front trunnion than nearly all other AKM derivatives and is not cross-compatible. The locking lugs are longer with correspondingly longer lug recesses in the trunnion. If you put a standard AKM bolt group into a Beryl 7.62, the lugs will not interface...
So, is it a full 100% mechanical copy of a Soviet SVD, as in the OOB safety is on the rear of the carrier and there [normally would be] is an OOB trip sear on the front of the trigger group (ATF said this is an auto sear... because reasons), and does not have the NDM-86's OOB disconnector sear...