CB SKSAR   
...................................................................................................................................................................................................
Phone: 623-606-1267
HomeOrderingInstallationOperationsGallery

SKS factory Bolt Hold-open Operation
(required to insert mags into SKS units with wide bolt)
SKS Bolt Differences (Standard and M Type)
The standard bolt (upper unit) requires the hold open of the bolt to be engaged in order to operate.  The wider profile prevents the mag feed lips from proper insertion.

The M type bolt (lower unit above) allows insertion of loaded magazines into the receiver, since the thinner profile fits between the mag feed lips.
Tapco 20 round mag, trimmed
(One mag included with each kit.  Additional mags for $25 each.)
This unsolicited SKSAR YouTube review/report by is by Lucas McCain, "The Rifleman".   The Rifleman is an acclaimed Systems reviewer of Rifles on YouTube.  Check out some of his other YouTube videos for more information.
This video was filmed nine months after the initial purchase. 
E Mail address:
cbsksar@yahoo.com
Our Compound Leverage Trigger System and chassis mounted knuckle safety system comes with the base kit.
A Customer produced this video showing the functionality of the SKSAR during rapid fire protocol (300 rounds within 5 minutes).  The first few rounds are spaced.  However, before long the customer shows the unit being fired as fast as the trigger can be pulled.  He utilizes Tapco 20 round and Promag 30 and 40 round magazine units.  Functionality is perfect.
Development of the Alternate CLT pull-Rod trigger system for Norinco/Russian, 2018 -


Years ago, we contacted Timney Triggers here in Phoenix to see if they would be interested in developing a viable battle rifle trigger for the SKS. We supplied them with both a Yugo and a Norinco unit to use for design review and testing.

In it's factory setting, the SKS trigger pull is long, somewhat gritty and also unresponsive and "mushy" due to the long throw mechanisms that comprise the unit.

Regrettably after almost a year, we picked up our guns and were advised that due to work required on other triggers for a popular bolt action rifle, they were unable to spend any time with the design and as such were unable to offer any design input.

At that point a year or so ago, we went ahead and devised our Compound Leverage Trigger for the SKSAR. The CLT does a magnificient job of cutting the trigger poundage in half as well as producing a sweet pull to engagement.

However, one of the main complaints , the long pull, could not be overcome with the system (without some gunsmithing work required to shorten the factory sear to hammer engagement). As such this year our design team devised another version of the CLT, but instead of engaging with the face of the factory trigger and the resultant long pull, we determined to locate the engagement trunnion above the main trigger and pull in lieu of pushing at the base of the axis point. It was our hope that the location at the axis point would have a better shorter response whose trigger weight could be overcome with the CLT physics.  

When all was said and done, the yield was a delightful 2-3 pound trigger with trigger travel reduced more than half of the standard CLT mechanism location.

That yield makes the SKS in our platform the perfect combination of smooth short travel and crisp (normally unheard of for the SKS) sear release. Accuracy can be enhanced better due to the better trigger feel.

We tested the unit in both the Norinco/Russian SKS as well as the Yugo. 

The Norinco/Russian performed flawlessly.  The Yugo units performed well, but needed a bit more trigger travel (possibly due to the longer sear engagement of our units).

If your Yugo has such a long travel as to prevent usage of the pull rod system, then use of the standard push rod CLT system would be required.   



Development of the Alternate left side charging handle.


A left side charging handle seems to be typical on most current manufactured 
battle rifles. The multiple benefits of ergonomic charging as well as general 
convenience seems to be an apparent benefit for the shooter.

We decided to proceed with a design, notwithstanding the challenge of the extremely heavy SKS bolt spring.

After field-stripping and a heavy cleaning of the bolt and the associated springs, including the trigger spring, we made sure the curly end of the SKS main bolt spring was inserted in first (as noted by SKS maintenance manuals), and we tested the system.  

The test proved that there was better leverage using the left side handle, with the right hand on the grip during charging. It wasn't bad at all.  However, not all physiques will be able to charge with the handle if there's not enough beef involved.

Even with the beef, you cannot be bashful pulling the handle back. After all a spring designed to offset the ballistics energy of the 7.62x39 has to be hearty. Even so we were delighted with the general ease of the function.  

It cannot be overstated that the bolt and bolt springs and such have to be cleaned and properly lubricated for it to work at optimum. (I actually tested the system on a somewhat cosmolite impregnated spring and the effort was almost twice it was with the cleaned system).

We also tested to see if the main bolt spring could be inserted in backwards with the straight end going in first. Every once in a while there was "grittiness", we assume due to the bolt cover scraping against the interior spring. Main thing - make sure the curly end goes into the bolt first.

The folks who have the M type bolt will benefit most since they will be able to insert a fully loaded mag as the first operation of the firing sequence. Simply pulling the charging handle back will then allow the bolt to go forward into battery. Those without the M bolt will have to lock the bolt open with the hold open tab as their first operation of the firing sequence. Not a big deal, but something to consider.

During the firing sequence, after firing all the rounds in the mag, the chamber will be held open with the SKS factory hold-open tab and the spent mag can be released and a full mag can be inserted. To place the gun in battery, you can either use the slam bolt function already included in the base kit, or you could also pull the left side charging handle back to gently engage the factory bolt handle and release it to charge the gun. 

It's fun, so have some!!!

Development of the Alternate bolt on Muzzle Brake (the "Brick") for the Norinco/Russian -


Due to the ballistics energy of the 7.62x39 cartridge, the SKS benefits from a good muzzle brake.

Some of our customers who benefitted from our Mosin Nagant bolt on brake (the "Spade") encouraged us to pursue something similar for the SKSAR since our design principle produced significant muzzle recoil for the extremely powerful 7.62x54r cartridge.

Normally, due to the Factory SKS trigger pull, fast semi-auto follow-up shots for the SKS are not very manageable.  A good muzzle brake, however, along with either our standard CLT push-rod system or our new CLT pull-rod, now makes follow up shots extremely feasible - especially with the new, shorter engagement pull-rod system.

The brake design principle is based on creating a longer expansion chamber (where the expansion is most active) with side ports as well as upper vents to assist in muzzle lift.  For weight considerations, the main body of the brake is 6061 aluminum.

Also, part of the design was to make the unit bolt-on so that the shooter could install the unit in a matter of minutes and be ready to go.

We included side pic rails in case mounting shooter's accessories is a consideration.  A lower one is also included in case the shooter has some accessory that would be better suited in that location.

Finally, we wanted the unit to appear well suited for our SKSAR chassis system, thus the "Brick" appearance.

We tested the system many times and found the follow up shots to be easily controlled and the muzzle blast was better dispursed.

There are good gunsmith installed brakes for the SKS available.  However, in case it suits the shooter's preferences to have a unit that more closely matches the SKSAR profile, the "Brick" is a great consideration.

(Note: the "Brick" muzzle brake is not suitable for the Yugo with the grenade launcher).
The "Brick" muzzle brake for SKS Norinco/Russian rifles
The "Brick" installed on the SKS makes the overall length of the gun to be 32.5" long
1 - Install the "C" clip on the front sight leaf as shown, sliding as high as possible.
2 - Install the right side assembly around the sight base and "C" clip.  There is a spring tensioned steel ball where the brake interfaces with the top of the barrel at the brake rear.
3 - Install the left side parts, mirroring the right side using the 1/2" long socket head screws.
4 - Install the lower pic rail using the shorter 2 socket head screws - tighten down all screws -