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Semi Auto Rifles

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AR15s, AR10s & Hunting Rifles - 109 Semi-Auto Rifles

Semi-automatic rifles are a popular choice for home defense, tactical operations, and range shooting.  Enthusiasts enjoy customizing AR15s, AR10s, and even traditional semi-auto rifles.

Our line of 109 Semi-Auto Rifles includes Brownells own BRN line of rifles. Also, it contains semi-auto calibers like the 5.56x45 NATO, 22 Long Rifle, 7.62x39mm, 9mm Luger, 308 Winchester and many others for hunting, target practice, tactical operations, and home defense.

Read the 4.7 Ratings out of 117 Reviews from verified buyers to help find the right semi-auto rifle to suit your needs and save Up To 14% Off on high-performance rifles. View all 449 Rifles at Brownells.

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SIG SAUER, INC. - MCX SPEAR-LT 7.62X39MM SEMI-AUTO RIFLE SIG SAUER, INC. - MCX SPEAR-LT 7.62X39MM SEMI-AUTO RIFLE
5 Stars
(0.0)

$2,599.99

Online Only - In stock
Product badge SIG SAUER, INC. - M400-DH3 5.56X45 NATO SEMI-AUTO RIFLE SIG SAUER, INC. - M400-DH3 5.56X45 NATO SEMI-AUTO RIFLE
5 Stars
(0.0)

$1,779.99

$1,999.99

Online Only - In stock
Product badge SIG SAUER, INC. - MCX-SPEAR SBR 7.62X51MM NATO SEMI-AUTO RIFLE SIG SAUER, INC. - MCX-SPEAR SBR 7.62X51MM NATO SEMI-AUTO RIFLE
5 Stars
(0.0)

$3,739.99

$4,199.99

In stock
Product badge SIG SAUER, INC. - MCX SPEAR-LT IR 5.56X45 NATO SEMI-AUTO RIFLE SIG SAUER, INC. - MCX SPEAR-LT IR 5.56X45 NATO SEMI-AUTO RIFLE
5 Stars
(0.0)

$2,599.99

Online Only - In stock
SIG SAUER, INC. - MCX-SPEAR SBR 6.8X51MM SEMI-AUTO RIFLE SIG SAUER, INC. - MCX-SPEAR SBR 6.8X51MM SEMI-AUTO RIFLE
5 Stars
(0.0)

$4,199.99

Online Only - In stock
Product badge SIG SAUER, INC. - M400 SDI XSERIES 5.56X45 NATO SEMI-AUTO RIFLE SIG SAUER, INC. - M400 SDI XSERIES 5.56X45 NATO SEMI-AUTO RIFLE
5 Stars
(5.0)

$1,499.99 - $1,599.99

Online Only - In stock
SIG SAUER, INC. - M400 TREAD 2.0 5.56X45 NATO SEMI-AUTO RIFLE SIG SAUER, INC. - M400 TREAD 2.0 5.56X45 NATO SEMI-AUTO RIFLE
5 Stars
(0.0)

$999.99 - $1,199.99

Online Only - In stock
Product badge SIG SAUER, INC. - M400-SENTRY 5.56X45 NATO SEMI-AUTO RIFLE WITH ROMEO5 GENII SIG SAUER, INC. - M400-SENTRY 5.56X45 NATO SEMI-AUTO RIFLE WITH ROMEO5 GENII
5 Stars
(0.0)

$1,749.99

Online Only - In stock
SIG SAUER, INC. - MCX-SPEAR 6.8X51MM SEMI-AUTO RIFLE SIG SAUER, INC. - MCX-SPEAR 6.8X51MM SEMI-AUTO RIFLE
5 Stars
(0.0)

$4,199.99

Online Only - In stock
SIG SAUER, INC. - MCX SPEAR 7.62X51 NATO SEMI-AUTO RIFLE SIG SAUER, INC. - MCX SPEAR 7.62X51 NATO SEMI-AUTO RIFLE
5 Stars
(0.0)

$3,499.99

Out of Stock
SIG SAUER, INC. - MPX PCC COMPETITON 9MM LUGER SEMI-AUTO RIFLE SIG SAUER, INC. - MPX PCC COMPETITON 9MM LUGER SEMI-AUTO RIFLE
5 Stars
(0.0)

$1,999.99

Out of Stock
Product badge SIG SAUER, INC. - MCX-SPEAR LT IR 5.56X45 NATO SBR SEMI-AUTO RIFLE SIG SAUER, INC. - MCX-SPEAR LT IR 5.56X45 NATO SBR SEMI-AUTO RIFLE
5 Stars
(0.0)

$2,499.99

Out of Stock
Product badge SIG SAUER, INC. - MCX-RATTLER LT 5.56X45 NATO SBR SEMI-AUTO RIFLE SIG SAUER, INC. - MCX-RATTLER LT 5.56X45 NATO SBR SEMI-AUTO RIFLE
5 Stars
(0.0)

$2,499.99

Out of Stock
Product badge SIG SAUER, INC. - MCX-RATTLER LT 300 AAC BLACKOUT SBR SEMI-AUTO RIFLE SIG SAUER, INC. - MCX-RATTLER LT 300 AAC BLACKOUT SBR SEMI-AUTO RIFLE
5 Stars
(0.0)

$2,499.99

Out of Stock
SIG SAUER, INC. - M400 ROSE 5.56X45 NATO SEMI-AUTO RIFLE SIG SAUER, INC. - M400 ROSE 5.56X45 NATO SEMI-AUTO RIFLE
5 Stars
(0.0)

$1,299.99

Out of Stock
SIG SAUER, INC. - 716I TREAD 7.62X51 NATO SEMI-AUTO RIFLE SIG SAUER, INC. - 716I TREAD 7.62X51 NATO SEMI-AUTO RIFLE
5 Stars
(3.3)

$1,699.99

No longer available
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