Upgrade your Krinkov-style AK build with the premium MSR Front Sight/Gas Block Combination designed specifically for Arsenal Bulgaria milled and stamped receivers. This authentic Bulgarian-made assembly delivers precise alignment, reliable gas operation, and integrated front sight functionality in one compact unit, ideal for short-barreled UR-type rifles across multiple calibers. Key Features Compatible with 5.45x39, 7.62x39, and 5.56x45 calibers for versatile build options 24x1.5mm right-hand thread pitch accepts standard muzzle devices and flash hiders Pre-installed retainer pin, plunger pin, and spring for simplified installation Integrated bayonet lug for classic Krinkov aesthetics and functionality Precision-machined for both stamped and milled receivers ensuring a secure fit Durable black finish resists wear in demanding tactical environments Specifications Length: 2.75 inches Width: 1.2 inches Height: 2.25 inches Weight: 8.5 ounces Origin: Made in Bulgaria by Arsenal Benefits for Your Build This combination unit solves common pain points in Krinkov builds by providing a factory-matched front sight and gas block that maintains proper gas port alignment and sight zero. The pre-assembled components reduce installation time and errors, while the multi-caliber compatibility future-proofs your project. Whether restoring a Bulgarian import or completing a custom short-barrel rifle, this OEM-quality part ensures reliable cycling and professional results. Why Choose This Arsenal Product Arsenal Bulgaria components are renowned for their mil-spec tolerances and durability. This front sight/gas block assembly matches the exact specifications used on original Krinkov rifles, offering superior concentricity for suppressor use and consistent performance under heavy use. Its compact dimensions make it perfect for folding stock configurations without adding unnecessary bulk.