Please email us at Techsales@opticsplanet.com for further assistance as there can be multiple factors contributing to your malfunctions.
The TRYBE Defense AR-15 Carbine Buffer & Spring Mil-Spec, will not work in a rifle length buffer tube or A2 style buffer tube.
The Magpul Industries PRS GEN3 Precision-Adjustable Stock is compatible with rifle length and Mil-Spec carbine length buffer tubes. This TRYBE Defense AR-15 Carbine Buffer & Spring Mil-Spec will work in a carbine length buffer tube so it will be compatible with the Magpul Industries PRS GEN3 Precision-Adjustable Stock.
The TRYBE Defense AR-15 Carbine Buffer & Spring includes a 10.5" carbine length spring (37 to 39 coils), and a standard carbine buffer which is 3.26" in length and weighs 3 oz.
5.4oz is the ideal buffer weight for AR's chambered in 9mm. Below is a link to one of the most popular AR 9 Buffer Assembly's we carry.
https://www.opticsplanet.com/angstadt-arms-ar-15-9mm-5-4-oz-carbine-buffer-assembly-w-carbine-buffer-spring-9.html
The TRYBE Defense AR-15 Carbine Buffer & Spring is a standard Mil-Spec buffer and spring. With your particular setup I would recommend a heavier H2 or H3 buffer. Or ODIN Works adjustable buffer. I'll drop a link below.
https://www.opticsplanet.com/odin-works-ar-15-adjustable-buffer.html
The buffer tube is made from 6061 aluminum
The TRYBE Defense AR-15 Carbine Buffer & Spring will work.
It is a standard 3 oz carbine buffer.
It is a multiple-position buffer tube that allows for the use of a collapsible stock.
Mark H.