Ammunition.
Crane can expect a port pressure within a relatively narrow range and tailor the gas port to that ammunition.
Stuff sold to civilians has to work with good ammunition as well as under powered crap like Tula. If they don't they get angry letters and internet posts about how unreliable their guns are. As I recall back when the mid-length first came out, BCM or one of the well respected companies made 16 inch mid-lengths with relatively small gas ports that worked quite nicely with American ammunition, but short stroked with some weak foreign ammo, which required the company to enlarge the gas port. People today, 10 or more years later, still bitch about how unreliable mid-lengths are because of this.
Black River Tactical
BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
BRT Bolt Carrier Groups M4A1, M16 CHROME
BRT Covert Comps 5.56, 6X, 7.62
In danger of sounding arrogant here, BUT.....buy shit guns to shoot your shitty ammo out of. Steel-cased, weak-ass Tula/Wolf/Brown Bear/whatever has never desecrated my AR's. Hell, unless it's the Gold Dot 64gr'ers that I have I don't even shoot .223 fodder. It's all 5.56 NATO pressure stuff. That steel-cased foreign crap is for AK's, not AR's. Don't care if this is a popular opinion or not; why should quality weapon makers cater to the lowest common denominator ammunition? If you're too broke-dick to buy 5.56 stuff buy a crappy AR with a window-sized gas port and have a ball.
Last edited by ABNAK; 11-07-19 at 18:22.
11C2P '83-'87
Airborne Infantry
F**k China!
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Last edited by RetroRevolver77; 08-20-20 at 13:41.
I'm not in disagreement with your SOP, but let's not pretend large commercial manufacturers don't get the lion's share of their money from consumers who don't see it that way. I started out with a S&W M&P15 that I largely shot PMC Bronze through. Eventually put a BRT gas port in and switched to higher quality ammo, then higher quality rifles as I learned a thing or two. Most consumers vote with their dollar, and stay where they voted the first time.
"Reliable" to who? Mine all function quite well with full-power 5.56 ammunition. Now I do have steel-cased stuff, but it ain't for an AR!
As Taekwondopreacher said "....I also think that shooting quality ammo through massively overgassed carbines is harder on the bolt". This is a true statement. Overgassed guns made for shit ammo will accelerate wear on parts when used with mil-spec fodder.
I guess my point is that quality AR manufacturers like Colt, BCM, LMT, etc. should keep the proper gas port sizes for mil-spec pressure ammo in civvie guns, not alter the size because of cheap-asses wanting to use crap ammo. They can buy a PSA or such and go to town. Hell, given the price of PSA stuff and the price of crap ammo you could legitimately get some good training in while keeping your 6920 and some 5.56 set aside for a "rainy day".
Last edited by ABNAK; 11-07-19 at 18:46.
11C2P '83-'87
Airborne Infantry
F**k China!
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