11.5″ Irregular Defense

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.

Available in black or FDE, in either pistol or SBR configuration.

Technical Specifications

Barrel:

• 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

Upper Receiver:

• 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)

Handguard:

• 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

Lower Receiver:

• 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

Furniture & Accessories:

• 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)