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Geissele Automatics
Overview
The Geissele AR15/M4 Reaction Block is a Mil-Spec buffer tube designed as a tube only assembly, providing a reliable foundation for your AR-15 build. This buffer tube is critical for proper function and cycling of the action, ensuring compatibility with Mil-Spec components and accessories. Commonly seen in builds featuring a mid-length gas system and chambered in 5.56 NATO, this component is essential for achieving a smooth and reliable shooting experience.
Based on build data

Bravo Company Manufacturing Mk2 Recoil Mitigation System - Mod 1 - T2

Sprinco Usa Reduced Power Kit Buffer 4-Coil Bolt Extractor Spring

Radian Forward Assist - 7075 Aluminum - Black
Forward Assist
Jp Enterprises Silent Captured Spring for Law Tactical Folder

Geissele Automatics Llc Ar-15 Ultra Precision 5 Axis Trigger Guard Ddc

Fn America Take Down Pin
Aggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Bravo Company Manufacturing Mk2 Recoil Mitigation System - Mod 1 - T2 | 12 | |
| Sprinco Usa Reduced Power Kit Buffer 4-Coil Bolt Extractor Spring | 9 | |
| Radian Forward Assist - 7075 Aluminum - Black | Forward Assist | 8 |
| Jp Enterprises Silent Captured Spring for Law Tactical Folder | 8 | |
| Geissele Automatics Llc Ar-15 Ultra Precision 5 Axis Trigger Guard Ddc | 8 | |
| Fn America Take Down Pin | 8 |
| Platform | Percentage |
|---|---|
| AR-15 | 93.8% |
| AR-9 | 6.3% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 76.5% |
| .223 Wylde | 11.8% |
| .450 Bushmaster | 11.8% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 57.9% |
| Carbine | 21.1% |
| Rifle | 15.8% |
| Pistol | 5.3% |
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