DEVGRU采购的定制款N4有两种口径，传统的5.56北约口径和.300 Blackout（BLK）口径。 两种版本除了枪管之外唯一的区别是抛壳窗盖上的铭文。 这个项目最独特，也可能是最有争议的一点，那就是 DEVGRU很可能已经使用.300 BLK口径大部份替代了5.56口径 。

4th Generation NSR- Noveske Skinny Rail- (M-LOK) Free Floating Handguard. INSIDE DIAMETER: 1.46″. WEIGHTS: 7″ – 4.5 oz. 9.75″ – 6.5 oz. 10.75″ – 7.2 oz. 13.5″ – 8.65 oz. 15″ – 9.85 oz. BARREL NUT WEIGHT:3.8 oz. Made in USA.

N4系列主要有7.5英寸的Diplomat型，10.5英寸的CQB型、14.5英寸的AFGHAN型、16.1英寸的RECON型和18英寸的SPR型，最近还开始推出7.62NATO口径的型号。 在国内被戏称为喷火猪的KX3消焰器，实际是一个喇叭型消焰器，重7.2盎司，直径1.35英寸，长3.28英寸

2021年5月17日 · 照片中的这些DG操作员们都换上了CP新款的G4蛙服和战斗裤，而手里的枪也发生了一些变化—原来常见的10.5寸HK416业已消失不见，取而代之的是Noveske的N4卡宾枪。

4th Generation NSR- Noveske Skinny Rail- (M-LOK) Free Floating Handguard. Inside Diameter: 1.46″. Weight: 10.75″ – 7.2 oz. Barrel Nut Weight: 3.8 oz. Made in USA.

The Noveske NSR Handguard is the smallest, lightest customizable handguard available for the AR-15. The bare handguard without any additional rail...

2024年6月12日 · 而n4两种口径的10.5英寸枪管都有出售，因此有利于训练。 发射.300枪弹的HK337，活塞导气系统的质量肯定比气吹系统大。 发射.300枪弹的LMT CSW，一体式上机匣会略重一些。

4th Generation NSR-Noveske Skinny Rail- (M-LOK) Free Floating Handguard –Hard Coat Anodized 6005-T5 Aluminum –Ultra Light and Robust Design –Featuring M-LOK mounting positions every 45 degrees with picatinny 1913 top rail –Light weight American made steel barrel nut. Includes: –Handguard –Barrel Nut –Mounting Screws –T25 Wrench

NOVESKE Gen 3 N4 NSR M-LOK HANDGUARD. The Noveske NSR (Noveske Skinny Rail) Handguard was designed with the goal of being the lightest and smallest free float forend option for the Modern Sporting Rifle enthusiast.

Noveske 5001044 NSR M-Lok Handguard 15" 6005A-T5 Aluminum Black Hard Coat Anodiz - This NSR (Noveske Skinny Rail) features a 6005-T5 aluminum construction with a black hardcoat anodized finish, a 1913 continuous top and bottom rail, and a M-Lok direct attachment system. It comes with a barrel nut, mounting screws, and a T25 wrench.