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23 Jan 2021

As stated above, many refer to the LWT barrel as a PENCIL barrel. I'm really close to getting a 16 inch 5.56 Faxon Gunner barrel for an AR upper build I'm going to be doing. It helps steady the rifle on target and absorbs recoil. The original M16 was designed with a relatively thin and light barrel, now generally referred to as a "pencil" profile. From the gas block back to the receiver the barrel is straight. When it comes to barrel diameter you do need to pay attention to the diameter of barrel at the gas block if your barrel doesn't come with one installed. Mass in the barrel can help you shoot more accurately and more comfortably. Yes, but I think the discussion is about a comparison of pencil profiles to M4 profiles, not M4 profiles to heavy profiles. Just wanted to hear from other what their experience has been with this kind of hybrid profile barrel as it has the Gov't profile up until the mid length gas block, then after that it's a pencil barrel … Ive been reading a lot about light vs military barrels and have yet to make up my mind. The common diameters are .750" for standard barrels and .936" for heavy barrels. The plan is to test 4 barrel profiles (10.5" Faxon Pencil, 10.3" DD MK18, 11.5" BCM ELW Fluted, 11.5" BCM Gov't) suppressed and unsuppressed cold for POI shift and group size both between profiles and between suppressed and unsuppressed, then heat them up and repeat the test with hot barrels/suppressors. The standard barrel is tapered and is sometimes referred to as the “skinny” or “pencil” barrel while the larger-OD heavy barrel is not tapered and imitates a piece of blued pipe. As far as accuracy goes I’m not totally convinced pencil barrels walk when they heat up only because they are warmer. but have M4 feed ramps. I think it’s possible that. If you have an A1 or a "pencil" barrel then your diameter will be .625". Im not so concerned about barrel heat as Im just a recreational shooter but, the weight savings are what interest me. https://www.everydaymarksman.co/equipment/ar-15-barrel-selection The barrel tapers from the gas block to the muzzle. The Army's test showed a dramatic durability increase between the standard M4 barrel and the Heavy profile barrel. This pencil has a buttery-soft exterior, a replaceable eraser, an incense-cedar barrel, and a smooth, dark core. Here is an S&W Model 10-8 Heavy Barrel, which is my preferred barrel configuration on this model. It’s harder to have a perfect load for a pencil barrel harmonics wise; Pencil barrels introduce mirage issues that aren’t as pronounced with thicker/carbon barrels. The original AR15/M16/M16A1 rifle/carbine & original M16A2 carbine standard barrel profile is now called the "LWT" lightweight. When I triggered a frisky load, the pencil-thin barrel would whip up as if yanked from the heavens, the rifle’s comb cracking my molars. You can find LWT barrels with standard feed ramps and LWT M4 barrels that are the same profile/wt. The thin barrel or ( Pencil Barrel ) as everyone calls it is .560 dia was the standard barrel until mid 2008 ( 580 series rifle ) that's when they changed to the tapered barrel or ( Heavy Barrel ) as ( SOME ) people call it .625 dia . S & W Model 10-8 heavy barrel, and a smooth, dark core M4 barrel and heavy. The `` LWT '' lightweight far as accuracy goes I ’ m not totally convinced pencil walk! M not totally convinced pencil barrels walk when they heat up only because they are warmer you shoot more and... If you have an A1 or a `` pencil '' barrel then diameter... Is straight light barrel, and a smooth, dark core ramps and LWT barrels... Been reading a lot about light vs military barrels and.936 '' for heavy barrels a eraser! 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