Tag Archives | Sionics Weapon Systems

SIONICS Geissele MKII Carbine – New for 2014

SIONICS Weapon Systems is an AR-15 manufacturer that should be on your radar. They are known for excellent fit and finish and for getting all the little things right which adds up to a reliable carbine. Their gas ports are right. Their staking is right. Their components are rock solid. They just get the AR-15 right and they do it for some of the most reasonable prices in the industry.

Sionics Geiselle

One of their newest offerings is their Geissele MKII Carbine. This has many of the same specs as their other carbines with the addition of a Geissele Automatics MKII rail and gas block. The barrel is the heart of any good carbine and SIONICS uses their proprietary medium contour, mid-length, 1 in 8″ twist, chrome lined barrels with 5.56 chambers. The Geissele MKII Carbine also features SIONICS NP3 coated bolt carrier with a HP/MPI tested bolt. It also features an ALG Defense QMS trigger and VLTOR receiver extension and IMOD stock.

The SIONICS Geissele MKII Carbine is not listed on their site yet but it available for purchase as a complete upper. The complete carbine will be available soon.

Check out SIONICS Weapon Systems.

Sionics Weapon Systems Barrels

I am about to let you in on what could be the best kept secret in AR-15 barrels. Sionics Weapon Systems is making what just might be the ideal general purpose barrel for the AR-15 and selling them at a price you won’t believe.

Sionics only sells one barrel right now but it is has two features that make it very attractive to me: 1 in 8″ twist and a medium contour. It has always boggled my mind that more AR-15 manufacturers weren’t using 1 in 8″ twists and medium contour barrels.


1 in 8″ twists are incredibly versatile. They will stabilize any bullet length that will feed out of a magazine and yet, because they are slightly slower than a 1 in 7″, they will handle much of the shorter (lighter) bullets as well. It is a very versatile twist rate and yet it is nearly impossible to find in chrome lined barrels.

Medium contour barrels also very functional yet inexplicably rare. A good medium contour barrel will weigh within a few ounces of a gov’t contour barrel yet offer improved performance in rapid fire strings due to the additional “meat” under the hand guards. It is also a more rigid and thus theoretically more accurate profile than the gov’t profile.

The mid-length gas barrels are made from 11595E CMV 4150 Steel and have a very clean manganese phosphate finish. The bore and chamber are chrome lined. They have true 5.56 chambers and M4 feed ramps. These barrels are x-rayed and MP inspected. All of their stripped barrels are dimpled for a low profile gas block. They weigh in at about 29 ounces (3 ounces more than a gov’t profile barrel).


Best of all, the stripped barrel costs only $159.95. They are also available with a number of different gas block options including a pre-installed low profile gas block which is a fairly hard to find option on stripped barrels.

I purchased one of these barrels for a build and if it shoots as well as they are reputed, it might just be the best deal going in AR-15 barrels.

Check out Sionics Weapon Systems’ barrels.

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