The infiniti X is rated for a wide variety of calibers, ranging from 22lr, to 9mm, up to 300 WinMag. Each category has different restrictions.

Pistol energy rounds are acceptable at any barrel length that stabilizes the bullet.

Medium rifle rounds (e.g., 5.56, 7.62×39, etc) are rated for barrels as short as 11.5″. No shorter.

Full power rifle rounds, such as the .308 Winchester or 6.5 Creedmoor are rated for 18″ barrels minimum.

Magnum rifle rounds (300 WinMag or similar) are rated for 22″ barrels or longer.

See the toggles below for a detailed list.

17 M2 (Rimfire)
17 HMR (Rimfire)
17 WSM (Rimfire)
22 Short (Rimfire)
22 Long (Full Auto)
22 LR (Rimfire)
22 Mag (Rimfire)
22 Hornet
22 K Hornet
218 Bee*
219 Zipper*
221 Fireball*
22-250*
223 Rem*
22 PPC*
30 PPC*
30 Carbine
30 Herrett
30 Mauser
30-30 Winchester*
32-20
32 S&W Long
32 H&R Magnum
4.6 X 30 HK (Full Auto)
5.56MM NATO*
5.7 X 28 FN (Full Auto)
6MM PPC*
6MM BR*
7-30 Waters*
9 x 18 (Full Auto)
9 x 19 (Base Caliber) (Full Auto)
9 x 21
9 x 23 (38 Super)
9 x 23 Winchester
9 x 25 Dillon
9 x 25 Super Auto G
300 BLACKOUT*
380 (Full Auto)
38 Special
38 S&W
357 Sig
357 Mag
357 Maximum Supersonic
357 Auto Mag
357 Herrett
338 Spectre
300/221 Fireball
300 Whisper©
5.45x39MM Russian*
6.5 Grendel*
8.6 Blackout*
6.8 SPC*
7.62 x 25 MM (Full Auto)
7.62 x 38 R*
7.62 x 39 MM*

.308 Win*
.30-06*
.243*
.260*
.270*
8mm Mauser*
.6.5 Creedmoor*
7mm Mag*
7mm – 08*
300 WSM*
338 Win Mag*
300 Win Mag*
350 Legend

8.6 Blackout(supersonic)*

* We recommend the full size, stainless steel Liberty Suppressors Fixed Barrel Adapter with these calibers.

• .223, 7.62 x 39, 6.8 SPC size family of cartridges are now rated for 11.5” barrels.

• 300 Blackout & 8.6 Blackout subsonic are now rated down to 5” barrels as long as the twist rate of the barrel will stabilize the bullet in flight. Supersonic loads are limited to 8″ or longer barrels.

• .308 families of cartridges, such as 243 Win, 270 Win, 30-06, etc. are rated for 18” or longer barrels.

• 300 Win Mag family of cartridges such as 7mm REM MAG, 338 Win Mag, 300 WSM, etc. as well as 6.5 PRC and 300 PRC are rated for 22” or longer barrels.