11.5" Irregular Defense | 5.56 | SBR

The Noveske x Irregular Defense 11.5" delivers elite short-barrel performance with a serialized 416R stainless match barrel; mid-length gas system; and hand-polished Noveske Match Chamber for exceptional accuracy and smooth reliability in a compact package. Built on matching Irregular Defense–marked Noveske Chainsaw forged receivers; the rifle features a full FDE Type III anodize + Cerakote finish; a 10.75" NSR M-LOK handguard perfectly spaced for suppressed use; and a CGS SCI-SIX flash hider/suppressor mount for immediate compatibility.

A full-auto rated BCG; Carpenter 158 MPI bolt; ambidextrous Noveske Love Handle charging handle; and pinned low-profile .750 gas block ensure durability under hard-use conditions. Premium ergonomics come from the full Irregular Defense furniture suite—including FEER riser; Special K grip; MHS hand stop; MRC panels; and MBS V1 Barricade Stop—paired with a B5 Systems Bravo stock and a Geissele SSA-E two-stage trigger for unmatched control and speed.

Lightweight at 6.25 lbs; suppressor-ready; and mission-configured in black or FDE; the Noveske x Irregular Defense 11.5" is the ultimate fusion of craftsmanship; combat-proven components; and modern performance—purpose-built for shooters who demand the best in a compact 5.56 platform.

• 11.5” 5.56mm 416R Stainless with 1:7 twist


• Individual serialized barrel for QC purposes


• Hand-polished Noveske Match Chamber


• Mid length gas tube system


• Straight fluted between chamber and gas block


• Noveske-marked gas block: Low profile; .750” journal; pinned to barrel


• M4 barrel extension w/extended hand polished feed ramps


• CGS SCI-SIX flash hider / suppressor mount

• IRGLR DFNSE marked Noveske Chainsaw forged upper receiver from 7075-T6 aluminum w/extended feed ramps


• Hardcoat type III anodizing (and Cerakote on the FDE SBR)


• Black nitride Noveske marked forward assist


• Noveske Love Handle charging handle


• Featuring anti-rotation interface with handguard


• Phosphate coated bolt carrier; full auto compatible; chrome lined carrier bore and key


• Properly staked grade 8 American made gas key bolts


• Phosphate bolt made from Carpenter 158 heat treated steel MPI tested (magnetic particle inspected)

• 4^th Generation NSR-10.75” (M-LOK) Free Floating Handguard


• Featuring M-LOK mounting positions every 45 degrees with picatinny 1913 top rail


• Lightweight American-made steel barrel nut


• The 10.75” handguard with a 11.5” barrel will return a .080” clearance from end of handguard to barrel thread shoulder. Perfect spacing when you add your favorite suppressor

• Irregular Defense marked Noveske Chainsaw forged lower receiver from 7075-T6 aluminum


• B5 Systems Bravo polymer trigger guard


• Government issue 90-degree safety selector


• Hardcoat type III anodizing (and Cerakote on the FDE SBR)


• Properly staked Noveske QD sling mount endplate


• Noveske marked takedown and pivot pin


• Adjustable tension screw for perfect fit between upper and lower


• Geissele SSA-E Super Semi-Automatic Enhanced combat proven two-stage trigger


• Noveske marked 6 Position mil spec impact extruded carbine extension


• H2 buffer with carbine action spring

• Irregular Defense Special K grip


• Irregular Defense MHS hand stop


• Irregular Defense MRC V1 x 2


• Irregular Defense MRC V2 x 2


• Irregular Defense MBS V1 Barricade Stop


• B5 Systems Bravo stock (SBR only – Pistol is braceless)


• Irregular Defense FEER stock riser (SBR only – Pistol is braceless)