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Sig Sauer SIG516 Patrol 5.56 NATO 16" Barrel 30 Round AR-15 Short Stroke Gas System Semi Automatic Rifle R516G2-16B-P

Sig Sauer SIG516 Patrol 5.56 NATO 16" Barrel 30 Round AR-15 Short Stroke Gas System Semi Automatic Rifle R516G2-16B-P

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Product Summary

The Fulfilled Potential of the AR-15/M16.

One of the most tested and proven weapons systems in the world achieves ultimate refinement with the introduction of the SIG516 rifle. With its chrome-lined, phosphated, military grade barrel and adjustable, four-position gas regulator, the SIG516 incorporates all of the most desirable mechanical improvements. Add to these a free-floating quad rail forend and barrel, and you have the most advanced, versatile AR-based rifle available.

Note: Actual production rifle may differ slightly from photos.


- Gas piston operating system
- Four-position gas regulator
- 5.56 x 45mm NATO
- Free-floating military grade chrome lined barrel
- M1913 Picatinny flat top upper
- 7075-T6 Aircraft grade aluminum upper & lower receiver with hard coat anodize finish
- Flip-up iron sights


- Action: Semi-Automatic
- Operating System: Short Stroke Pushrod, Rotating Bolt
- Caliber: 5.56mm NATO
- Overall Length: 35.7"
- Trigger Type: Mil-Spec
- Trigger Weight: 7.6 lbs.
- Barrel Length: 16"
- Rifling: 1 in 7"
- Number of Grooves: 6
- Weight without Magazine: 7.3 lbs.
- Capacity: 30 Rounds
- Magazine Type: AR-15 Type, Aluminum
- Accessory Rail: Yes
- Advanced Pushrod Gas System

Caliber Dictionary

The Below Information Has Been Provided From Our Gun Caliber Dictionary And Is Meant For Informational Purposes Only. It Is Not Intended to Describe The Unique Specifications For This Ammunition.
The 5.56X45mm NATO cartridge was designed by James Sullivan, a member of Eugene Stoner's engineering team that developed both the M16 rifle and its original cartridge. The 5.56X45mm NATO was adopted by the U.S. military in 1964 and by NATO in 1980. With bullet diameter of .224-inch, the original M193 military cartridge used a 55-grain bullet at 3250 fps; the current M855A1 cartridge, developed by FN, uses a 62.5-grain bullet at 3020 fps, offering greater range and better penetration. The civilian version of the 5.56X45mm is 223 Remington; the cartridges are dimensionally identical but military chamber dimensions and specifications for military brass are different. It is considered safe to use 223 Remington ammo in a 5.56X45MM NATO chamber, but not a good idea to use 5.56X45mm ammo in a rifle specifically chambered for the 223 Remington. Although the stopping power of .22-caliber bullets remains controversial the 5.56X45mm has served well in now multiple generations of M16 rifles. — Craig Boddington

Specification   Value
Caliber   5.56mm NATO
Condition   New
MFG NO    R516G2-16B-P
SKU    59238
UPC    798681441426
Sig Sauer
Phone:   603-772-2302
Email:   info@sigarms.com
Website:   http://www.sigsauer.com
Address:   18 Industrial Drive

Exeter, NH 03833
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