Recent content by sinister

  1. sinister

    SR25 + RC2 & Double Feeds, Lube thoughts?

    I concur. I have 16-, 18-, and 20-inch 7.62 ARs, all with rifle-length gas and suppressors. Try an XH buffer and Tubb spring. Use military LSA or Geissele purple lube instead of grease.
  2. sinister

    Not what l expected

    Seeing many, many examples of Ballistic Advantage and Faxon barrels -- I wouldn't waste my money and patience. If your rifle won't shoot a decent flat-based benchrest bullet or factory Federal 69 Match ammo sub-MOA at 100 and 200 yards you are flushing good money down the toilet. You will...
  3. sinister

    The bolt of the AR-10\308 rifle is broken.

    What manufacturer?
  4. sinister

    U.S. Army/Navy/USMC M14-based sniper and DMR/SDM rifles circa late-1960s to late 201Xs

    The Army did its typical bumbling and stumbling and after wasting many years and millions of dollars announced in September 2017 the HK M110A1 would replace the EBR. The HK started fielding in 2020 and has delivered to almost all Army squads and platoons. There is still no Field Manual or...
  5. sinister

    U.S. Army/Navy/USMC M14-based sniper and DMR/SDM rifles circa late-1960s to late 201Xs

    Note the Small Caliber Data Sheets post the "Ideal" loading, while Lake City Army Ammunition Plant might have daily, weekly, or monthly deviations due to differences in primer and powder lot performance to meet military acceptance. M118 Special Ball designation came once Lake City could no...
  6. sinister

    1/2 moa to 3-4 moa. Help

    What is your current round count? How many rounds do you shoot between cleaning?
  7. sinister

    AR-10 is chewing up my brass

    The long longitudinal scratches are probably from your magazine feed lips. Your primers have a raised rim around the firing pin indent but your primer cups still have a radius and are not flattened, while the case head has flowed slightly into the ejector hole. I would stop using Hornady brass...
  8. sinister

    SP10 Not Ejecting - slomo video

    It appears to be extracting fine, all the way until the BCG hits the end of the receiver extension. It looks to me like your ejector springs are not kicking out the ejector plungers at all.
  9. sinister

    Odd Winchester Post '64 Model 70... Possibly Custom Shop?

    For comparison, a Winchester (Army contract) production rifle:
  10. sinister

    XM7 worries from the field.

    Just eyeballing it, the conventional brass-case .276 (x 51.4mm) Pederson would be about the same dimensions as the hybrid-case 6.8 x 51mm (6.8 Fury). It would probably be the equivalent of todays conventional brass-case SIG 6.8 x 51 training round -- and thus fit into a short-frame AR-10...
  11. sinister

    XM7 worries from the field.

    If we're looking at Southeast Asia re: pure human operational factors -- there are reasons the lightweight and efficient M16A1 and CAR-15 were and still are so popular. It's hot and typically wet and / or humid in most places, some with hills and mountains. In many, humans are in heat stress...
  12. sinister

    Recommend me a muzzle device

    You could try a Witt Machine SME.
  13. sinister

    Waterline your Plates

    We used to call this concept "Center of Mass." Aim to hit where the target's the biggest. It doesn't necessarily give you a CNS hit -- but it gives you the highest chance of getting a hit.
  14. sinister

    XM7 worries from the field.

    The infantry (including Special Forces) may eventually be issued the XM7 and XM250. In my time I had a Big Army issued M16A2 musket and Beretta in the arms room in nice tidy racks. Directly across would be our camouflaged CAR-15s with doo-dads and .45s. Today it's M4s and Glock 19s. The same...
  15. sinister

    XM7 worries from the field.

    June 14, 2025 marks the 250th anniversary of the founding of the United States Brigade of Infantry and the United States Army. We had infantry and an Army before we had a nation. The side that runs out of fighting and resisting humans first dies. You want to take over a country, you kill...
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