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Firearms Size Comparison Guide
Apr
Firearms Size Comparison Guide
When a Ruger LCP .380 disappears in your pocket but a Barrett M82 demands a bipod, firearm size directly impacts functionality. Let’s break down real-world dimensions across concealed carry, home defense, and long-range platforms.
Concealed Carry: Micro vs. Subcompact
The Sig Sauer P365 (5.8″ overall length, 1″ width) set the standard for micro-compacts, holding 10+1 rounds of 9mm in a package smaller than most wallets. Compare that to the Glock 19 (7.36″ length, 1.26″ width) – still concealable but offering better grip and 15+1 capacity. For deep concealment, the Kel-Tec P-3AT (.380 ACP) measures just 5.2″ long and 0.77″ wide, but sacrifices shootability.
Full-Size Duty Pistols
Service pistols like the Glock 17 (8.03″ length) and 1911 Government (8.5″ length) dominate this category. The Beretta M9/92FS stretches to 8.5″ with its exposed barrel, while polymer-framed competitors like the Smith & Wesson M&P9 (7.5″) trim bulk without sacrificing magazine capacity (17+1 rounds standard).
Rifle Platforms: AR-15 vs. AK-47
A standard 16″ AR-15 carbine measures 32-35″ collapsed, while the AK-47 (typically 34.3″) carries more weight forward. Bullpups like the IWI Tavor X95 (26.5″ overall) deliver full rifle ballistics in shotgun-length packages. For extreme compactness, the 5.5″ barreled Sig Sauer MCX Rattler folds to just 16″ total length.
Long-Range & Big Bores
The Barrett M107A1 (.50 BMG) stretches 57″ with its 29″ barrel, weighing 35 lbs unloaded. Compare that to precision rifles like the Remington 700 (45-48″ depending on barrel length) or the compact Ruger Precision Rimfire (32-36″ adjustable) for training.
What’s the smallest reliable 9mm pistol?
The Springfield Armory Hellcat (5″ length) and Sig P365 lead the micro-compact category, balancing reliability with dimensions smaller than most smartphones.
How does shotgun length compare?
A Mossberg 500 with 18.5″ barrel measures ~39″ overall, while tactical models like the Shockwave (26.4″) use pistol grips to skirt NFA length requirements.
Does barrel length affect accuracy?
Velocity drops about 25-50 fps per inch in rifles, but precision depends more on quality than length. A 10.3″ Daniel Defense MK18 can outshoot cheap 20″ barrels.
For hands-on comparisons with specs that matter, browse our firearms collection sorted by size and application.
Last updated: April 28, 2026
