l***a
发帖数: 2677 | 1 这个upper口碑如何？好像就是24" varminter的upper缩短成20"枪管
1:8，20" Fluted Extra Heavy 1" diameter Barrel。跟我现在的1:7 twist, 16″
Govt Profile 0.75" diameter barrel比打远程会有很大提高吗？
http://www.bushmaster.com/products.asp?cat=6
20" Predator Upper Receiver/Barrel Assembly
Adapted from our very accurate and successful 24" Varminter, the Predator
Upper Receiver/Barrel Assembly's 20" Fluted Extra Heavy Barrel is button
rifled 1 x 8" to stabilize the heavier 69-77 grain bullets that a predator
hunter/caller would choose for bigger varmints and predators. This superb
barrel features fluting for increased cooling and weight reduction; an 11
degree competition crown; 1" diameter heavy profile under the handguard;
custom match hybrid chamber with a tighter SAAMI Spec headspace from the
shoulder of the chamber to the bolt face, and longer chamber throat or "
Leade". This chamber accommodates 5.56mm ammunition without developing
higher pressures encountered when firing 5.56mm ammo in a .223 chamber with
shorter "Leade" (both calibers can be used safely). This Upper is sold
complete with Bolt, Bolt Carrier and Charging Handle to ensure positive
lockup between bolt and barrel extension. The Predator Upper also features a
Vented Tubular Aluminum Free-Floater Forend with Bipod Stud (free-floats
the barrel from the barrel nut forward) and B.M.A.S. 1/2" Mini-Risers to add
scope height for correct sight picture and comfortable cheek weld. | j***n
发帖数: 3786 | | l***a
发帖数: 2677 | 3 Went over budget upgrading my car today, no money for major gun purchase now
. :(
【在 j***n 的大作中提到】
: 要精度，上Noveske Upper
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